Patent US3057616A successfully refreshed from Google Patents.
US3057616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for refining of metals
Assignee: Stora Enso Oyj
•
Filing: 1960-03-08
•
Granted: 1962-10-09
•
Expires: 1980-03-08
Abstract
No abstract record available.
Inventors
- 👤 Wohlfahrt Sixten Ed Sixtensson
- 👤 Johansson Folke Karl Evald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:46
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A DEVICE FOR REFINING IRON ALLOYS AND OTHER METALS AND METAL COMPOUNDS COMPRISING A LINED ROTARY MELTING FURNACE IN A LYING POSITION HAVING AT LEAST ONE BLAST TUYERE PROJECTING INTO THE FURNACE ABOVE AND DIRECTED AGAINST THE CHARGE TO BE REFINED THEREIN, SAID TUYERE BEING PIVOTED
Claim 2
Independent Claim
46 words
A DEVICE FOR REFINING IRON ALLOYS AND OTHER METALS AND METAL COMPOUNDS COMPRISING A LINED ROTARY MELTING FURNACE IN A LYING POSITION HAVING AT LEAST ONE BLAST TUYERE PROJECTING INTO THE FURNACE ABOVE AND DIRECTED AGAINST THE CHARGE TO BE REFINED THEREIN, SAID TUYERE BEING PIVOTED
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |